Hexnode XDR Policies: Build Your First Detection Rule

Why SOC teams need a focused first detection rule

Hexnode currently implements administrator-defined detection rules through Alert Profiles. Each profile combines a supported endpoint event with filters, endpoint scope, and an Email or Webhook notification channel. Security teams can use these elements to specify which behavior matters, where it must occur, and who should receive the resulting alert. Starting with one tightly scoped rule makes its logic, signal quality, and notification volume easier to validate before monitoring expands across additional endpoints or event types in production environments at scale.

Broad monitoring often creates more notifications than analysts can triage effectively. High-volume events without precise filters can flood inboxes and incident queues, bury meaningful activity, and contribute to alert fatigue. At the other extreme, incorrect filters or endpoint targeting can exclude the behavior the SOC intended to observe.

A practical first rule might monitor creation of a sensitive process on a small endpoint group. Alternatives include suspicious process access, creation of an unexpected registry key, or a network connection initiated from selected endpoints during an initial, tightly controlled validation period.

What happens when detection logic is poorly designed?

Poorly designed detection logic creates noise or blind spots. Conditions that are too broad can flood analyst inboxes and incident queues, obscure higher-priority signals, and waste investigation time on routine activity. As volume rises, analysts may struggle to identify which alerts require immediate attention.

The opposite failure is equally risky. Overly narrow filters, incorrect endpoint targeting, or disabled delivery channels can allow policy-violating activity to pass unnoticed. Reliable design balances coverage with precision, giving SOC teams clearer context for faster triage and more consistent escalation without promising complete breach prevention.

What is a Hexnode XDR detection policy?

A Hexnode XDR detection policy is useful editorial shorthand for an administrator-defined monitoring rule. In current Hexnode console terminology, however, this workflow is implemented through Alert Profiles, not the Policies interface. This distinction matters because an Alert Profile defines when an operational event should create an alert and notification.

As documented in the Hexnode XDR Alert Profiles guide, the rule structure follows: event + filters + source endpoints + delivery channel + schedule. The event identifies behavior to monitor, while the source limits coverage to selected endpoints, Endpoint Groups, or both. The channel routes matching notifications through Email, Webhook, or both, and the schedule controls immediate or repeated delivery.

Filters narrow event matches with supported comparators including =, !=, and contains. Administrators can join conditions with AND, broaden matching with OR, or use Group to construct nested logic.

How do Policies, Alert Profiles, alerts, and threats differ?

Policies, Alert Profiles, alerts, and threats serve different functions in Hexnode XDR:

• Policies configure endpoint security controls and XDR agent behavior.
• Alert Profiles define custom conditions and notification delivery.
• Alerts record operational events that match those conditions.
• Threats represent activity detected and classified as malicious.

The documented Policies workflow manages settings such as Microsoft Defender management, device inactivity thresholds, agent-removal timing, and Remote Terminal access. It does not provide the custom event-and-condition logic used to generate alerts; that capability belongs to Alert Profiles.

This distinction also determines what analysts can do after detection. Incidents > Alerts is a read-only monitoring view. Analysts perform remediation through the Threats workflow, where controls include endpoint isolation, process termination, process-tree termination, file quarantine, and deletion.

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How do you build your first Hexnode XDR detection rule?

To build your first Hexnode XDR detection rule, define the behavior to monitor, select the corresponding event, add filters, choose endpoints, configure delivery, set the timing, review the Alert Profile, activate it, and test the result. This sequence converts a monitoring objective into a verifiable rule and notification path.

Before opening the console, document a measurable use case. Identify the event of interest, its expected source, the affected endpoint group, the intended recipient, and the action an analyst should take after receiving the alert. These details provide clear test criteria.

Start with one narrowly scoped, observable behavior on a limited endpoint set. Validate logic and notification volume before expanding coverage.

Step 1: Select the event and build the filter logic

In the Hexnode XDR console, go to Settings > Alert Profiles, select Add New Event, and choose the event that matches the defined behavior. Supported options include Process Creation, Process Access, Network Connection, Registry Create Key, File Creation, System Logon, and DNS Query.

Hexnode supplies a predefined message for the selected event. Customize it with context the receiving analyst needs, such as the monitored behavior, expected endpoint group, validation priority, or escalation cue. Retain useful event placeholders so the delivered notification identifies the affected device and relevant event details.

For example, a Process Creation rule could use Process Name contains powershell to detect matching executions. Use AND when both conditions must match, but avoid a fixed process ID when monitoring recurring application launches because PIDs identify individual process instances and can be reused. Use OR when either of several approved patterns should trigger the alert. Use Group to nest related conditions within more complex logic. Never leave high-volume event types unfiltered; broad matching can produce excessive alerts and overwhelm channels.

Step 2: Choose endpoints, delivery channels, and timing

Select the Alert Profile’s source by adding individual endpoints, Endpoint Groups, or both. Begin with a small test group that represents the intended environment, then broaden assignment only after confirming that the rule produces an acceptable signal volume.

Next, choose Email, Webhook, or both as the delivery channel. Email requires a recipient, subject, and body; the recipient can be a listed technician or a specified email address. To use Webhook, first configure the destination under Settings > Notifications > Webhook, then select it from the available webhook list.

For timing, choose Immediately to send a notification whenever conditions match. Alternatively, configure a repeating daily, weekly, or monthly schedule. The documented scheduled time is set in IST, so distributed SOC teams should convert it against local shifts and coverage windows. For weekly and monthly schedules, Hexnode documents batching alerts into a single email, making these options suitable for lower-urgency review.

Step 3: Review, activate, test, and tune the Alert Profile

On the Review screen, rename the default New Alert Profile label and inspect the configured event, filters, sources, channels, and schedule. Select Finish, then verify that the profile appears under Settings > Alert Profiles with its status enabled. If necessary, enable it using the status toggle.

Generate an approved test event on an in-scope endpoint; use a controlled action that matches the rule without creating production risk. Confirm that the resulting record appears in Incidents > Alerts and reaches the selected Email or Webhook destination. Open the profile’s Logs to verify the notification creation time, channel, and delivery status.

Tune the rule before expanding it:

• Inspect false positives against the expected test baseline.
• Confirm endpoint scope.
• Refine filters.
• Review message context.
• Check for endpoint synchronization delays or conditions that are too restrictive.

Step 4: Connect the alert to an analyst response workflow

When activity matches an Alert Profile, Hexnode XDR creates an alert and sends the configured notification. It does not automatically contain the endpoint: Incidents > Alerts is a read-only monitoring view.

Attach each alert to a documented response playbook. Assign an owner, specify validation steps, define escalation criteria, identify evidence to collect, and establish when the observed activity should be treated as a possible threat.

For confirmed threats, analysts should move to the Threats workflow for further investigation. Documented analyst-driven controls include Isolate, Kill Process, Kill Process Tree, Quarantine File, and Delete File. Webhook delivery can hand alert data to an external workflow, but it does not constitute automatic native remediation.

How Hexnode XDR supports detection, triage, and response

Hexnode XDR supports focused monitoring through Alert Profiles with selectable endpoint events, field-level filters, AND/OR/Group logic, and targeting for individual endpoints, Endpoint Groups, or both. Administrators can deliver matching notifications through Email, Webhook, or both; choose immediate or scheduled delivery; and use notification Logs to review creation times, channels, and delivery status.

For triage, Incidents > Alerts provides a read-only record of operational events that matched administrator-defined conditions. The Threats view serves a different purpose: it provides investigation context and analyst-controlled containment actions for activity identified as malicious.

Together, these capabilities create a structured detect-notify-investigate workflow for security admins and SOC analysts. Properly scoped rules can reduce irrelevant notifications and improve response consistency, but not complete prevention or fully automated remediation.

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